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一、防虫网室的搭建种植菜心应选择白色、20目左右的防虫网作为覆盖材料。防虫网室一般为水泥钢架结构,采用3.33厘米镀锌钢管为立柱,立柱柱脚采用现浇水泥柱体,每个立柱之间跨度为3米,柱与柱之间的顶端和中部用镀锌卡槽连接,卡簧固定防虫网,地上部高2.5~3米,大小可根据地块面积确定。一般每个网室面积
First, the construction of insects and insect net cabbage planting should choose white, 20 mesh insect net as cover material. Insect-proof net room is generally a steel structure of steel, 3.33 cm galvanized steel pipe for the column, column column foot with a cast-in-place cement column, each column between the span of 3 meters, column and column between the top and middle plating Zinc card slot connection, snap spring fixed insect net, the ground above 2.5 to 3 meters, the size can be determined according to the area of the plot. General each net room area